The cache is not at the posted coordinates. Answer some question about the Nervous System and certitude will provide you with WP1. WP1 will lead you to GZ. Note that the soluiton checker only checks for GZ, not WP1, so use certitude to check your answers for the puzzle.
WP1 - AB=Number of bolts holding the wooden planks in place. CD=Number of large white words. GZ is found at S 35 2(B+A+2).C(B+A)D E 149 0(B+C).(B-A)(B+A+C)(B-A-C) 
DOWN
1 Down 2nd Letter
2 Down Last letter
3 Down Number of words
5 Down Penultimate letter
17 Down 2nd letter
8 Down 8th letter
ACROSS
9 Across last letter
18 Across 3rd letter
15 Across 1st letter
16 Across 4th letter
12 Across 6th letter
You can validate your puzzle solution with certitude.